Black drill bit on a white background
Black drill bit on a white background
The Reseller Depot LLC

Bosch BL4020 #20 Jobber Drill Bit HSS 12-Pack

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$9.99
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  • High-Speed Steel Construction: Professional-grade HSS material delivers superior durability and heat resistance for drilling steel, cast iron, aluminum, and general metalworking applications
  • Precision Jobber Length Design: 3-1/4" length provides optimal balance between reach and rigidity for accurate, straight holes without flexing or chatter in metal drilling

The Bosch BL4020 #20 jobber drill bit delivers professional-grade precision for metalworking, construction, and maintenance drilling applications. Featuring high-speed steel construction and 3-1/4" jobber length design, these bits provide superior durability and heat resistance when drilling steel, cast iron, aluminum, and general metal materials. The #20 wire gauge size creates accurate pilot holes and mounting points with minimal effort. This 12-pack offers exceptional value for professionals who demand consistent performance and reliability. Brand New condition ensures optimal cutting performance right out of the package.
  • Brand: Bosch Professional Grade
  • Model: BL4020
  • Size: #20 Wire Gauge (0.161" diameter)
  • Overall Length: 3-1/4 inches
  • Bit Type: Jobber Length Twist Drill
  • Material: High-Speed Steel (HSS)
  • Application: Steel, Cast Iron, Metal Drilling
  • Condition: Brand New
  • 12 x Bosch BL4020 #20 Jobber Drill Bits

Q: What materials can these Bosch drill bits cut through?

A: These high-speed steel jobber bits are designed for drilling steel, stainless steel, cast iron, aluminum, brass, and copper. They also work effectively in wood, plastic, and composite materials for versatile metalworking and general-purpose drilling applications.

Q: What does jobber length mean and why does it matter?

A: Jobber length is the standard drill bit length that provides optimal balance between reach and rigidity. The 3-1/4" length offers sufficient drilling depth while maintaining stability for accurate, chatter-free holes in metal and other materials.

Q: Why choose a 12-pack instead of individual bits?

A: A 12-pack ensures you always have sharp replacement bits on hand, reduces downtime from worn or broken bits, and provides better value compared to buying individually—ideal for professionals and frequent users.

Q: Can these drill bits be resharpened when dull?

A: Yes, high-speed steel bits can be resharpened using a drill bit sharpener or grinding wheel to restore cutting performance and extend their useful life significantly.